Question

Решите уравнение 5х^2+3х-2=0

Answer 1

D = 9 + 40 = 49 
√ D = 7
X1 = ( - 3 + 7 ) : 10 = 0,4 
X2 = ( - 10) : 10 = - 1 

Answer 2

$5x^2+3x-2=0 \ D=b^2-4ac=3^2-4*5*(-2)=9+40=49 \ \ x_1= frac{-b+ sqrt{D} }{2a} =frac{-3+ 7 }{10} = frac{4}{10} = 0,4 \ \ x_2= frac{-b- sqrt{D} }{2a} =frac{-3- 7 }{10} = frac{-10}{10} = -1$